Retail traders watching a live XAU/USD chart are seeing an aggregated price feed, but the actual mechanics behind that number involve a decentralized network of dealers and settlement conventions that never touch a public exchange floor.
1. OTC is the dominant market, not the exception
Unlike equities, which trade almost entirely on centralized exchanges, the majority of global gold volume moves through over-the-counter (OTC) transactions between bullion banks, refiners, central banks, and large institutional counterparties. The London bullion market operates this way: two parties agree on a price and settlement terms bilaterally, with no centralized order book. COMEX futures, by contrast, are exchange-traded and represent a comparatively smaller (though highly visible and liquid) slice of total gold market activity.
2. How the LBMA Gold Price benchmark actually works
For decades, the reference price for physical gold ("the London Fix") was set via a telephone call among five member banks, twice a day. Following manipulation concerns, this was replaced in 2015 by the LBMA Gold Price, an electronic auction run by ICE Benchmark Administration. Accredited participants submit buy and sell volumes at a proposed price; the price is adjusted iteratively until buy and sell volumes are within a defined tolerance, typically under 10,000 ounces of imbalance. The resulting price becomes the benchmark referenced in contracts worldwide, including many mining royalty agreements and central bank reserve valuations.
3. What "dark pools" mean in this context
A dark pool is a trading venue where order size and participant identity are not disclosed until after execution. In gold-adjacent markets, this typically applies to large block trades in gold ETFs (like GLD) or gold-mining equity baskets executed away from the lit exchange, rather than spot bullion itself, which is already largely OTC and thus inherently non-transparent to retail observers. The practical implication for a retail trader is the same either way: a large institutional buyer or seller can complete a transaction of significant size without that order appearing on the visible depth-of-market ladder, meaning sudden price moves can occur without a corresponding visible order flow signal beforehand.
4. Settlement mechanics: T+2 versus futures expiry
Spot gold transactions in the OTC market conventionally settle on a T+2 basis, meaning the exchange of metal for cash occurs two business days after the trade date. This differs from COMEX futures, which have fixed monthly expiry and delivery cycles (commonly February, April, June, August, October, and December for gold), after which a trader must roll the position forward or accept physical delivery obligations. A CFD or spot forex-style gold position mimics OTC spot conventions but is typically cash-settled with no physical delivery mechanism at all, since the broker is acting as counterparty rather than facilitating physical bullion transfer.
5. Practical implications for a retail trader
- Price feeds from different brokers can show small discrepancies (often a few cents) because each broker aggregates OTC dealer quotes slightly differently rather than pulling from one central tape.
- Sudden liquidity gaps around the twice-daily LBMA auction windows (10:30am and 3:00pm London time) can produce brief volatility as large benchmark-linked orders execute.
- Understanding that OTC dealer positioning, not a visible exchange order book, drives much of spot price formation explains why gold can gap through apparent support/resistance levels with no visible order flow warning on a retail platform.
